In Majorca, Atoning for the Sins of 1691

Rarely do visitors come with missions as precise as Joseph Wallis and a small contingent of Orthodox rabbis from Israel: To touch the smooth sandstones of a 14th-century synagogue turned into a Roman Catholic church. To offer a special 15th-century version of the Kaddish, a prayer for the dead that was once forbidden under threat of death and was delayed for 320 years.